ADUM3481BRSZ-RL7

Overview

The ADUM3481BRSZ-RL7 is a small, quad-channel digital isolator manufactured by Analog Devices Inc. It provides four independent isolation channels with unidirectional signal transmission. The device operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 25 Mb/s. Key electrical specifications include an insulation voltage of 3750 Vrms, a typical propagation delay of 33 ns, and a common-mode transient immunity (CMTI) of 25 kV/µs. The component is housed in a 20-pin SSOP package and functions reliably across an operating temperature range from -40°C to +125°C.

Feature Summary

• Provides four independent unidirectional isolation channels for signal transmission
• Utilizes magnetic coupling technology for robust galvanic isolation
• Features high common-mode transient immunity to maintain signal integrity in noisy environments

Applications

• Industrial automation systems requiring isolated communication interfaces
• Medical equipment needing reinforced safety isolation
• Power electronics control circuits with high-voltage noise rejection requirements

Procurement Notes

Verify the specific suffix RL7 indicates reel packaging when sourcing. Confirm the BRSZ designation corresponds to the SSOP-20 package variant. Ensure compatibility with system voltage levels between 3 V and 5.5 V. Check for RoHS compliance documentation if required by regulatory standards. Validate that the 25 Mbps data rate meets application timing constraints.

Selection Notes

Select this component when four isolated bidirectional or unidirectional channels are needed at moderate speeds. Compare against higher-speed variants like the ADUM3482 if data rates exceed 25 Mbps. Consider power consumption differences compared to lower-speed models like the ADUM3481A. Evaluate package size constraints against larger SOIC options. Verify insulation voltage requirements match the 3750 Vrms rating.

Part Context

This part belongs to the ADUM3481 family of small quad-channel digital isolators. It shares architectural similarities with other ADUM series devices but offers specific performance characteristics tailored for general-purpose isolation. The family includes variants with different data rates and package options to suit diverse design needs.

Replacement Considerations

The ADUM3481ARSZ-RL7 serves as a functional substitute with identical pinout and features but operates at a lower data rate of 1 Mb/s. Ensure the reduced speed meets application requirements before substitution.